1 files changed, 10 insertions, 3 deletions

diff --git a/3rdparty/Sabre/VObject/Property.php b/3rdparty/Sabre/VObject/Property.php
index 624dd4b8a58..06058229043 100644
--- a/3rdparty/Sabre/VObject/Property.php
+++ b/3rdparty/Sabre/VObject/Property.php
@@ -149,13 +149,16 @@ class Sabre_VObject_Property extends Sabre_VObject_Element {
             if (!is_null($itemValue)) {
                 throw new InvalidArgumentException('The second argument must not be specified, when passing a VObject');
             }
+            $item->parent = $this;
             $this->parameters[] = $item;
         } elseif(is_string($item)) {
 
             if (!is_scalar($itemValue)) {
                 throw new InvalidArgumentException('The second argument must be scalar');
             }
-            $this->parameters[] = new Sabre_VObject_Parameter($item,$itemValue);
+            $parameter = new Sabre_VObject_Parameter($item,$itemValue);
+            $parameter->parent = $this;
+            $this->parameters[] = $parameter;
 
         } else {
             
@@ -231,12 +234,15 @@ class Sabre_VObject_Property extends Sabre_VObject_Element {
                 throw new InvalidArgumentException('A parameter name must be specified. This means you cannot use the $array[]="string" to add parameters.');
 
             $this->offsetUnset($name);
-            $this->parameters[] = new Sabre_VObject_Parameter($name, $value);
+            $parameter = new Sabre_VObject_Parameter($name, $value);
+            $parameter->parent = $this;
+            $this->parameters[] = $parameter;
 
         } elseif ($value instanceof Sabre_VObject_Parameter) {
             if (!is_null($name))
                 throw new InvalidArgumentException('Don\'t specify a parameter name if you\'re passing a Sabre_VObject_Parameter. Add using $array[]=$parameterObject.');
-            
+
+            $value->parent = $this; 
             $this->parameters[] = $value;
         } else {
             throw new InvalidArgumentException('You can only add parameters to the property object');
@@ -258,6 +264,7 @@ class Sabre_VObject_Property extends Sabre_VObject_Element {
         $result = array();
         foreach($this->parameters as $key=>$parameter) {
             if ($parameter->name == $name) {
+                $parameter->parent = null;
                 unset($this->parameters[$key]);
             }